Here is a single color palette with 8 cold soft colors for a school's student management page, including a red and green accent color:

1. Color Name: Icy Blue
   Hex Code: 
          
          #B0E2FF
       
   Description: A soft, calming blue reminiscent of a winter sky.

2. Color Name: Mint Frost
   Hex Code: 
          
          #A1FFCE
       
   Description: A refreshing and cool mint green, evoking a sense of tranquility.

3. Color Name: Lavender Mist
   Hex Code: 
          
          #E0B0FF
       
   Description: A delicate and soothing shade of lavender, perfect for a serene atmosphere.

4. Color Name: Frosty Pink
   Hex Code: 
          
          #FFCFE0
       
   Description: A gentle and comforting pink, adding a touch of warmth to the palette.

5. Color Name: Arctic Gray
   Hex Code: 
          
          #D2D4DC
       
   Description: A cool and neutral gray, providing a subtle backdrop for the other colors.

6. Color Name: Snow White
   Hex Code: 
          
          #FFFFFF
       
   Description: A pure and bright white, symbolizing clarity and simplicity.

7. Color Name: Cherry Red
   Hex Code: 
          
          #FF5C5C
       
   Description: A vibrant and energetic red, serving as the accent color for attention-grabbing elements.

8. Color Name: Forest Green
   Hex Code: 
          
          #2ECC71
       
   Description: A rich and deep green, offering a sense of balance and harmony to the palette.

This color palette creates a harmonious and inviting visual experience for the school's student management page, with the cherry red and forest green serving as the lively accent colors.